定期排污是定期排除炉水中的(),排污点位于()。
参考答案:水渣;水冷壁下联箱
His teacher often tells us _____ much time _____ TV.[ ]
A. not to spent; watch;
B. to not spend; watching;
C. don't spend; watch;
D. not to spend; watching
对于矩形化粪池,当日处理污水量小于等于10m3时,采用双格化粪池,其中第一格占总容积的()。
A.30%
B.50%
C.60%
D.75%